Differential Effects of Endotracheal Suctioning on Gas Exchanges in Patients with Acute Respiratory Failure under Pressure-Controlled and Volume-Controlled Ventilation

Table 3

Tidal volume (), respiratory system compliance (), and airway pressure changes before and after endotracheal suctioning under pressure-controlled ventilation (PCV) or volume-controlled ventilation (VCV).

Time	PCV		VCV
	(mL/kg)	(mL/cmH2O)	(cmH2O)	(mL/cmH2O)	(cmH2O)
Baseline level	9.0 ± 0.1	25.3 ± 7.8	25.1 ± 7.5	24.6 ± 6.3	23.8 ± 5.8
Before suctioning	7.5 ± 2.2^*	20.9 ± 5.8^*	36.2 ± 8.7^*	15.9 ± 5.8^*	26.2 ± 6.4
1 min	6.3 ± 1.8^*	17.8 ± 6.8^*	34.8 ± 8.4^*	16.6 ± 5.1^*	27.9 ± 7.3^*
3 min	6.4 ± 1.9^*	17.8 ± 6.3^*	34.9 ± 6.5^*	16.6 ± 6.6^*	27.8 ± 5.9^*
5 min	6.5 ± 1.6^*	18.0 ± 6.7^*	34.7 ± 7.8^*	16.7 ± 6.4^*	27.9 ± 6.9^*
10 min	6.5 ± 2.0^*	18.1 ± 7.3^*	34.5 ± 8.2^*	16.8 ± 5.5^*	28.0 ± 7.6^*

^*, compared with the baseline level, PCV: pressure-controlled ventilation, VCV: volume-controlled ventilation, : tidal volume, : airway peak pressure, : respiratory system compliance, and : airway plat pressure.